(Subsea Production Control Fluids)

High-performance, high-temperature water-based hydraulic fluids with an operational temperature range from -25°C to 180°C (-13°F to 356°F). Oceanic HW740 R is used in modern open and closed loop Subsea Production control systems.

Key Benefits

  • Maximum operation temperature 100°C/212°F
  • Excellent corrosion protection (liquid&vapour phase) and lubrication properties
  • Resistant to microbial infection
  • Fluorescent dye for leak detection
  • Fully compatible with Oceanic HW500 Series, HW500 P Series, HW500E Series, HW443 Series & XT900
  • Manufactured to NAS 1638/AS 4059 class 6/6b-f or better cleanliness
  • Meet stringent global environmental acceptability regulations
  • Qualified to ISO13628-6/API 17F, approved for use by all major equipment manufacturers
  • Specified for high-pressure & high-temperature wells with downhole temperature up to 180°C/356°F
  • Free Fluid Monitoring programme ensures lasting service life
Typical Physical PropertiesOceanic
HW 740 R
AppearanceClear Red/Pink Fluorescent Fluid
Specific [email protected]°C1.07
Pour Point<-31°C (24°F)
Kinematic Viscosity (cSt)
-20°C (-4°F)
0°C (32°F)
40°C (104°F)
Complies with API 6A class P,R,S,T,U & V

Environmental Information

MacDermid maintains worldwide environmental approvals and can offer Oceanic Subsea Production control fluids suitable for use in every exploration and production region around the world. The current environmental status of Oceanic HW740 R in your area can be obtained from our environmental specialists.


Oceanic HW740 R should be stored in dry conditions, ideally out of direct sunlight. Normal storage temperature range is 5 to 40°C.

Material Compatibility

Oceanic HW740 R contain performance additives which ensure high levels of compatibility with materials typically used in subsea production control equipment. Extensive material compatibility tests have been performed with Oceanic HW740 R.

Ferrous metals (cast iron, carbon steel, low & high alloy steels, stainless steels…)Compatible
Non-ferrous metals (copper, brass, bronze and other metals and alloys*)…Compatible with alloys typically used in subsea production control equipment.
Avoid Zn, Cd, Pb and Mg metals. Aluminium should be hard anodised.
Coatings and ceramic materials Avoid porous coatings. Compatible with most ceramic parts. Check ceramic coatings.
Packaging & sealing materials
(elastomers and thermoplastics*)
Compatible with standard NBR, HNBR, FFKM, VMQ/FMVQ, CR, TFE/PTFE, PEEK.
Some FKM & AU/EU/PU have proven to be incompatible.
Umbilical hose liner thermoplasticsCompatible with Nylon 11, PE and Polyether ester copolymers.
Absorbent gasket materialsAvoid cork, leather, cotton impregnated materials.
PaintsAvoid painting internal surfaces
Cured epoxy, phenolic and nylon based paints are satisfactory. Avoid less resistant paints as they soften. Wash spillages immediately with water.
Filter elementsPolypropylene and glass fibre filter elements recommended over paper filters.
*As material compatibility varies from compound to compound and supplier to supplier, consult supplier for recommendations or request specific compatibility tests.

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